This turn in the story has completely deflated any momentum they may have had going.

I mean, let's see here. Lucas and Chloe are broken up. Chloe and Daniel are together. Lucas is about to find out in a very ho-hum random way about the affair. These are all things that should've been built towards in an explosive, climatic way. Instead, it's just kind of crumbling apart with no pop, no climax.

Sure, Lucas is about to get caught in an explosion, and perhaps he'll end up with memory loss and Chloe will end up staying with him out of sympathy, but it doesn't change the fact that they should've saved the breakup and Lucas learning the truth for the real climax at the end of the story. The impact of the reveal will be severely lessened the second time around because of this, IMO.

Did I miss a spoiler about an explosion in which Lucas is hurt?

Either way its predictable that Lucas and Chloe will reunite because the truth about blechy sex hasn't come out yet.